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EJH 015 Frame
The EJH is an ideal fit for machine builders transitioning from mechanical or hydraulic systems to all-electric servo drives. Unlike traditional worm gearhead out on the market, the EJH utilizes a globoidal gear mesh, resulting in 300% shock load capacity and a quiet, smooth-running drive.
With torque capability up to 7800 in. lb. and backlash as low as 6 arc-min, the EJH is well suited for metals, plastics or rubber processing machinery applications requiring a robust, compact solution. NIDEC DTC can customize this product to fit your needs by offering a variety of solid shaft, hollow shaft or shrink disc output mounting options.
Technical Data
EJH 015 Frame Size, 1 Stage Specifications
| Ratio | Unit | Note | 5 | 6 | 7 | 8 | 9 | 10 | 15 | 20 | 25 | 30 | 40 | 50 | 60 |
| Nominal Output Torque | [Nm] | – | 35 | – | – | – | – | 47 | 48 | 48 | – | 46 | 42 | 41 | 38 |
| Maximum Acceleration Torque | [Nm] | – | 46 | – | – | – | – | 59 | 61 | 59 | – | 57 | 52 | 51 | 48 |
| Emergency Stop Torque | [Nm] | – | 183 | – | – | – | – | 217 | 216 | 209 | – | 192 | 148 | 150 | 128 |
| No Load Running Torque | [Nm] | *1 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 | 0.51 |
| Nominal Input Speed | [rpm] | – | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 |
| Max Continuous Input Speed | [rpm] | – | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 |
| Maximum Cyclic Input Speed | [rpm] | – | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 | 4,000 |
| Maximum Radial Load | [N] | *2 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 | 3,110 |
| Maximum Axial Load | [N] | *3 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 | 1,780 |
| Moment of Inertia (≤ Ø14) | [kgcm2] | – | 0.75 | – | – | – | – | 0.59 | 0.56 | 0.54 | – | 0.54 | 0.53 | 0.53 | 0.53 |
| Moment of Inertia (≤ Ø19) | [kgcm2] | – | 0.95 | – | – | – | – | 0.79 | 0.76 | 0.74 | – | 0.74 | 0.73 | 0.73 | 0.73 |
| Moment of Inertia (≤ Ø28) | [kgcm2] | – | 2.13 | – | – | – | – | 1.97 | 1.94 | 1.92 | – | 1.92 | 1.91 | 1.91 | 1.91 |
| Efficiency | [%] | *4 | 88 | – | – | – | – | 86 | 84 | 81 | – | 76 | 72 | 69 | 66 |
| Torsional Rigidity | [Nm/arcmin] | – | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 610.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 |
| Max Torsional Backlash (Standard) | [Arc-min] | – | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 | ≤32 |
| Max Torsional Backlash (Low) | [Arc-min] | – | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 | ≤ 15 |
| Noise Level | dB [A] | *5 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 | ≤ 73 |
| Ambient Temperature | [°C] | – | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 | -25~100 |
| Permitted Housing Temperature | [°C] | – | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Protection Class | – | – | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 | IP65 |
| Lubrication | – | – | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil | Synthetic Oil |
| Service Life | [Hours] | – | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 | 25,000 |
| Weight | [kg] | *6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
- Torque at no load applied to the input shaft at 2,000 rpm
- The maximum radial load the gearbox can accept
- The maximum axial load the gearbox can accept
- The efficiency at the nominal output torque rating
- Measured with no load applied to the input shaft at 2,000 rpm
- Weight may vary slightly between models
EJH 015 Dimensions – Hollow Output Shaft
| Frame Size | Unit | Note | EJH 015 |
| L1 | [mm] | – | 6.5 |
| L2 | [mm] | – | 3.5 |
| L3 | [mm] | – | 42 |
| L4 | [mm] | – | 52.5 |
| L5 | [mm] | – | 118 |
| L6 | [mm] | – | 33.5 |
| L7 | [mm] | – | 36.5 |
| L8 | [mm] | – | 121 |
| L9 | [mm] | – | 41.5 |
| L10 | [mm] | – | 79.5 |
| L11 | [mm] | – | 38.1 |
| L12 | [mm] | – | 55 |
| L13 | [mm] | *1 | 95.5 – 105.5 |
| L14 | [mm} | – | 45 |
| L15 | [mm] | – | 28.5 |
| L16 | [mm] | – | 8 |
| D1 ±0.03 | [mm] | – | Ø 63.45 |
| D2 | [mm] | – | Ø 79.5 |
| D3 (h7) | [mm] | – | Ø 25 |
| T1 | [mm] | – | 4xM8X12 |
| T2 | [mm] | – | 4XM6 Bolts |
| V1~V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 015 Dimensions – Solid Output Shaft
| Frame Size | Unit | Note | EJH 015 |
| L1 | [mm] | – | 22 |
| L2 | [mm] | – | 4 |
| L3 | [mm] | – | 32.5 |
| L4 | [mm] | – | 42 |
| L5 | [mm] | – | 53 |
| L6 | [mm] | – | 89 |
| L7 | [mm] | – | 142 |
| L8 | [mm] | – | 33.5 |
| L9 | [mm] | – | 36.5 |
| L10 | [mm] | – | 121 |
| L11 | [mm] | – | 41.5 |
| L12 | [mm] | – | 79.5 |
| L13 | [mm] | – | 38.1 |
| L14 | [mm} | – | 55 |
| L15 | [mm] | *1 | 95.5 – 105.5 |
| L16 | [mm] | – | 45 |
| L17 | [mm] | – | 22.5 |
| L18 | [mm] | – | 6 |
| D1 | [mm] | – | Ø 79.5 |
| D2 (k6) | [mm] | – | Ø 20 |
| T1 | [mm] | – | 4xM8x12 |
| T2 | [mm] | – | 4xM6 Bolts |
| V1 ~ V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 015 Dimensions – Hollow Output with Shrink Disk
| Frame Size | Unit | Note | EJH 015 |
| L1 | [mm] | – | 6.5 |
| L2 | [mm] | – | 3.5 |
| L3 | [mm] | – | 30.5 |
| L4 | [mm] | – | 42 |
| L5 | [mm] | – | 52.5 |
| L6 | [mm] | – | 141.5 |
| L7 | [mm] | – | 33.5 |
| L8 | [mm] | – | 36.5 |
| L9 | [mm] | – | 121 |
| L10 | [mm] | – | 41.5 |
| L11 | [mm] | – | 79.5 |
| L12 | [mm] | – | 38.1 |
| L13 | [mm] | – | 55 |
| L14 | [mm} | *1 | 95.5 – 105.5 |
| L15 | [mm] | – | 45 |
| D1 ±0.03 | [mm] | – | Ø 63.45 |
| D2 | [mm] | – | Ø 79.5 |
| D3 (h7) | [mm] | – | Ø 25 |
| T1 | [mm] | – | 4xM8x12 |
| T2 | [mm] | – | 4xM6 Bolts |
| V1 ~ V9 | [mm] | *2 | Motor attachment dimensions are made to fit your servo motor. |
EJH 015 Dimensions – Optional Mounting Flange (*1)
| Frame Size | Unit | Note | EJH 015 |
| L1 | [mm] | – | 22.5 |
| L2 | [mm] | – | 6 |
| L3 | [mm] | – | 28.5 |
| L4 | [mm] | – | 8 |
| L5 | [mm] | – | 86 |
| L6 | [mm] | – | 2.5 |
| L7 | [mm] | – | 10 |
| L8 | [mm] | – | 32.5 |
| L9 | [mm] | – | 4 |
| L10 | [mm] | – | 22 |
| L11 | [mm] | – | 4 |
| L12 | [mm] | – | 27.5 |
| D1 (k6) | [mm] | – | Ø 20 |
| D2 (h7) | [mm] | – | Ø 25 |
| D3 | [mm] | – | Ø 10 |
| D4 | [mm] | – | Ø 149 |
| D5 | [mm] | – | Ø 168 |
| D6 ±0.03 | [mm] | – | Ø 114.30 |